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I found the following in this forum:

\def\firstcircle{(0,0) circle (1.5cm)}   
\def\secondcircle{(60:2.1cm) circle (1.5cm)}   
\def\thirdcircle{(0:2.1cm) circle (1.5cm)}

My goal is to draw three circles with intersections. It works fine. But i do not know why. It's clear what the coordinate (0,0) in the definition of the first circle means.

But how can I interprete (60:2.1cm) or (0:2.1cm)?

Torbjørn T.
  • 206,688
David
  • 103
  • I think those are polar coordinates. So (60:2.1cm) is at an angle of 60 degrees and a radius of 2.1cm. Also, while code snippets are useful in explanations, it is always best to compose a fully compilable MWE that illustrates the problem including the \documentclass and the appropriate packages so that those trying to help don't have to recreate it. – Peter Grill Apr 17 '17 at 10:42
  • Ok. Thanks for your answer. Now it is clear. – David Apr 17 '17 at 10:44

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